:root {
    --design-width: 750
}

* {
    box-sizing: border-box;
}

@media screen and (min-width:600px) {
    :root {
        --design-width: 1920
    }
}

html[rem] {
    font-size: calc(100 / var(--design-width) * 100vw)
}

* {
    -webkit-tap-highlight-color: transparent
}

html {
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased
}

body {
    margin: 0;
    font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", Arial, sans-serif;
    font-size: 16px
}

figure,
p {
    margin: 0
}

img,
video {
    max-width: 100%
}

h1,
h2,
h3,
h4,
h5,
h6 {
    margin: 0;
    padding: 0;
    font-weight: 400
}

ol,
ul {
    margin: 0;
    padding: 0;
    list-style: none
}

table {
    border-collapse: collapse;
    border-spacing: 0
}

td,
th {
    padding: 0
}

button,
input,
select,
textarea {
    color: inherit;
    font-family: inherit;
    margin: 0
}

.hidden2,
.hidden3,
.hidden4,
.hidden5 {
    display: -webkit-box;
    -webkit-box-orient: vertical;
    overflow: hidden
}

.hidden1 {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap
}

.hidden2 {
    -webkit-line-clamp: 2
}

.hidden3 {
    -webkit-line-clamp: 3
}

.hidden4 {
    -webkit-line-clamp: 4
}

.hidden5 {
    -webkit-line-clamp: 5
}

.clearfix::after,
.clearfix::before {
    content: "";
    width: 0;
    height: 0;
    display: block;
    clear: both
}

html.gray-model,
html[gray-model] {
    filter: grayscale(100%)
}

html.color-weak-model,
html[color-weak-model] {
    filter: invert(80%)
}

pre {
    margin: 0;
}